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| Paper: |
The X-ray View of Compact Radio Sources |
| Volume: |
427, Accretion and Ejection in AGN: a Global View |
| Page: |
159 |
| Authors: |
Guainazzi, M. |
| Abstract: |
This paper presents recent results from Chandra and
XMM-Newton observations of compact radio galaxies. Both the shape of
the X-ray spectra and the broadband Spectral Energy Distributions
suggest that the high-energy emission of their compact
cores (≲1 kpc) is primarily due to accretion.
Quasars (and the galaxy B1345+125) show
additionally a wide variety of X-ray morphologies, such as extended
emission on scales ≳1 kpc, and large scale jets,
the latter being possible signatures
of recurrent activity.
Quasars X-ray spectra are generally unobscured, whereas high
column densities (≳1022 cm–2) are common in galaxies.
Even in Compton-thick sources, however,
the gas density is not enough to permanently confine the jet.
If the high-energy emission of X-ray bright
compact radio galaxies is primarily due
to accretion, their jets are expected to evolve unimpeded through the
interstellar medium and reach their full maturity as FR II radio
galaxies. However, data do not rule out an alternative evolutionary
channel, ending in low-power, highly disrupted FR I jets. |
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